test: check that pending warning is emitted once

Code for the new --pending-deprecation flag contains logic to make sure the deprecation warning is emitted only once. However, this was not being tested. Add test coverage for this situation. PR-URL: #12527 Reviewed-By: Luigi Pinca <[email protected]> Reviewed-By: Daniel Bevenius <[email protected]> Reviewed-By: Colin Ihrig <[email protected]> Reviewed-By: James M Snell <[email protected]>
nodejs · Apr 24, 2017 · 75bfdad · 75bfdad
1 parent 6ee6aae
commit 75bfdad
Showing 1 changed file with 6 additions and 0 deletions.
diff --git a/test/parallel/test-buffer-pending-deprecation.js b/test/parallel/test-buffer-pending-deprecation.js
@@ -12,4 +12,10 @@ const bufferWarning = 'The Buffer() and new Buffer() constructors are not ' +
 
 common.expectWarning('DeprecationWarning', bufferWarning);
 
+// This is used to make sure that a warning is only emitted once even though
+// `new Buffer()` is called twice.
+process.on('warning', common.mustCall());
+
+new Buffer(10);
+
 new Buffer(10);